Hi Richard. Yes, sorry. Microsoft haven't made SkyDrive Pro / SharePoint integration into Finder like they have with Windows. It may be that Apple wont let them. But Apple will allow Microsoft to develop applications that will install on a Mac such as Office and Office Document Connect.
Have you tried opening the SharePoint library in the browser and dragging and dropping the files into the browser?
It's not a synchronizing solution, but it could be an easier way of getting the image files into SharePoint.